drm/amd/powerplay: add interface to check fw version (v2)

This patch adds interface to check fw version for smu.
It's to send msg GetDriverIfVersion to check if the return value is equal with
DRIVER_IF_VERSION of smc header.

v2: add detailed info to describe this function
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -184,6 +184,14 @@ static int smu_smc_table_hw_init(struct smu_context *smu)
 	if (ret)
 		return ret;
 
+	/*
+	 * Send msg GetDriverIfVersion to check if the return value is equal
+	 * with DRIVER_IF_VERSION of smc header.
+	 */
+	ret = smu_check_fw_version(smu);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 

drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h

@@ -44,6 +44,7 @@ struct smu_funcs
 	int (*check_pptable)(struct smu_context *smu);
 	int (*parse_pptable)(struct smu_context *smu);
 	int (*populate_smc_pptable)(struct smu_context *smu);
+	int (*check_fw_version)(struct smu_context *smu);
 };
 
 #define smu_init_microcode(smu) \
@@ -66,6 +67,8 @@ struct smu_funcs
 	((smu)->funcs->parse_pptable ? (smu)->funcs->parse_pptable((smu)) : 0)
 #define smu_populate_smc_pptable(smu) \
 	((smu)->funcs->populate_smc_pptable ? (smu)->funcs->populate_smc_pptable((smu)) : 0)
+#define smu_check_fw_version(smu) \
+	((smu)->funcs->check_fw_version ? (smu)->funcs->check_fw_version((smu)) : 0)
 
 
 extern const struct amd_ip_funcs smu_ip_funcs;